Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

The fifth-longest natural arch in the world, and the longest outside China.

A cemetery for only coon hounds in northwest Alabama.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

Mile-long cave system near Great Smoky Mountains.

Enormous lake at the bottom of a unique cave system.

This museum pays tribute to the Cherokee leader who created a written language for his people.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

A historic Civil War estate-turned-museum looks back on the Confederate States of America.

A collection of huge Pre-Colombian structures in Alabama.

Orr Park's dead trees have been carved into a menagerie of whimsical visages.

Once one of the largest producers of pig iron in the world.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

The second oldest continuously operating bar in Louisiana.

A spiritual vortex among the red rocks in Sedona.